XML 10 R1.htm IDEA: XBRL DOCUMENT v3.23.1
Document And Entity Information - shares
 6 Months Ended
Mar. 31, 2023
May 11, 2023
Document Information [Line Items]    
Entity Registrant Name PhenixFIN Corp  
Trading Symbol PFX  
Document Type 10-Q  
Current Fiscal Year End Date --09-30  
Entity Common Stock, Shares Outstanding   2,090,889
Amendment Flag false  
Entity Central Index Key 0001490349  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Document Period End Date Mar. 31, 2023  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q2  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Document Quarterly Report true  
Document Transition Report false  
Securities Act File Number 1-35040  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 27-4576073  
Entity Address, Address Line One 445 Park Avenue  
Entity Address, Address Line Two 10th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10022  
City Area Code (212)  
Local Phone Number 859-0390  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Security Exchange Name NASDAQ  
Entity Interactive Data Current Yes  
5.25% Notes due 2028    
Document Information [Line Items]    
Trading Symbol PFXNZ  
Title of 12(b) Security 5.25% Notes due 2028  
Security Exchange Name NASDAQ